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HKHKG USANC
E-commerce parcels

Hong Kong to Anchorage freight CO2 emissions

One tonne of cargo shipped Hong Kong (HKHKG) to Anchorage (USANC) by sea emits 91.5 kg CO2e well-to-wake at GLEC v3.2 default factors. The same tonne by air emits 7,453.6 kg — roughly 81x the sea number.

Lane noteAnchorage Ted Stevens is the major trans-Pacific air-cargo refuelling and crew-change stop — FedEx and UPS operate huge tech-stop volumes en route from Asia to US lower-48 hubs. The HKG-ANC segment alone moves over 1 million tonnes of air cargo annually.

Per-tonne CO2e by mode

Sea freight

Container ship 8,000+ TEU

91.5
kg CO2e
Distance
12,200 km
Factor (WTW)
7.5 g CO2e/tkm
Per shipment
1 t × 12,200 km
Factor source
GLEC v3.2 container 8,000-15,000 TEU (Post-Panamax, WTW)

Air freight

Freighter long-haul

7,453.6
kg CO2e
Distance
8,470 km
Factor (WTW)
880 g CO2e/tkm
Per shipment
1 t × 8,470 km
Factor source
GLEC v3.2 dedicated freighter, long-haul (WTW)

Mode comparison

On the Hong Kong to Anchorage lane, air freight emits about 81 times more CO2e per tonne than sea freight at GLEC v3.2 defaults. The gap is driven by the WTW factor difference between long-haul belly cargo (880 g CO2e/tkm) and a Container ship 8,000+ TEU (7.5 g CO2e/tkm), partly offset by the shorter great-circle air routing.

Try this in the calculator

These numbers are GLEC v3.2 defaults at 1 tonne. Change weight, vessel class, or load factor in the calculator and see the per-mode CO2e update under ISO 14083:2023 data quality tiers.

Methodology references

Need primary-data emissions for Hong Kong to Anchorage?

The EcoFreight API ingests AIS, bunker delivery notes, and shipment manifests to return ISO 14083 Tier 3 primary-data numbers for the same lane. Free tier covers 1,000 calculations per month.